A novel adduct has formed upon reaction of a cyclic pyrazolate trimer ofcopper (I) with an azopyridine molecule. Single crystal X-ray diffractionanalysis shows an extended ladder-shaped solid forming as monoclinic crystalsystem. The characterization of the resulting product, including the crystalstructure and the spectral and electrochemical properties, suggests significantcommunication between the copper-pyrazolate centers and the diiminelinearly-bridging ligands. Uncommonly, the extended infinite conjugation of thechromophoric units has resulted in a �black absorber� with glassy black singlecrystals capable of absorbing the solar radiation in the entire visible region.Overall, the results anticipate significant electrical conductivity and otherphotonic and optoelectronic device applications for this new class of extendedmolecular solids that we have started to investigate with a plethora ofstructural variations.

Copper-based extended coordination polymers with remarkable optoelectronic properties

248th National Meeting (2014)

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